Hang in there! It will be so worth it! There were days (weeks?) I thought my sewing/work room was never going to be finished - the first it was supposed to be finished by Halloween, then by Thanksgiving - I actually got to move in stuff and finish a few things for Christmas! I was lucky because we had a contractor doing things - unfortunately after his regular job, so things had many delays. My poor DH kept asking me to prioritize things - after the walls, which thing to do next --- I tried to explain I couldn't put the machines, tables, fabric and stuff back until all the cabinets & lights were up, paint and trim on walls, etc.
You are going to have a beautiful room full of light! Keep taking pictures of the progress. And keep posting your progress!